-- @testpoint: opengauss关键字constraint_schema(非保留)，作为函数名，部分测试点合理报错

--关键字不带引号-成功
drop function if exists constraint_schema;
create function constraint_schema(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带双引号-成功
drop function if exists "constraint_schema";
create function "constraint_schema"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带单引号-合理报错
drop function if exists 'constraint_schema';
create function 'constraint_schema'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `constraint_schema`;
create function `constraint_schema`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function if exists constraint_schema;
drop function if exists "constraint_schema";